Abrading machine



Jan. 30,- 1940. R. J. M QUADE ABRADING MACHINE Filed Nov. 25, 1938 2 Sheets-Sheet 1 3mm Faber :7: jlfi Quade,

Jan. 30, 1940. R. J. M QUADE ABRADING MACHINE Filed Nov. 25, 1938 2 Sheets-Sheet 2 Patented Jan. 30, 1940 uNrrso} STATES PATENT oFriCE 2,188,720 I ABRADING'MACHINE Robert J. McQuade, Chicago, vIll. Application November 25, 1938, Serial No. 242,387

2 Claims.

This invention relates to a portable machine particularly adapted for abrading the ends of locomotiveengine cylinders so that the cylinder heads will seat accurately thereon, although capable of. other analogous uses.

The primary object of the'present invention is to provide an improved abrading machine of the above kind which is extremely simple and durable in construction, efficient in use, and readily applicable to the work.

A more specific object of the present invention is to provide an'abrading machine of the above kind including a rotating abrading element, and means for mounting such abrading element and a driving motor therefor so that said abrading element may be readily adjusted as desired with respect to the work, as well as caused to traverse the work for operating upon the latter entirely about its circumference.

With the above general objects in view, and others that will become apparent as the nature of the invention'is better understood, the present invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings:

Figure 1 is a fragmentary end elevational view of a locomotive cylinder supporting an abrading machine constructed in accordance with the present invention, the abrading machine being in proper position for abrading the end of the engine cylinder so that the cylinder head will seat accurately thereon.

Figure 2 is a view of the construction shown in Figure 1, partly in side elevation and partly broken away and in section.

Figure 3 is a fragmentarysectional view of the abrading machine per se, the plane of section being indicated by the line 3-3 in Figure 1; and

Figure 4 is a fragmentary section on line 4-4 of Figu e 3.

Referring in detail to the drawings, 5 indicates a conventional locomotive engine cylinder against the end of which is usually clamped an ordinary cylinder head, such as by means of. suitable nuts threadedupon stud bolts 6 carried by and projecting from the cylinder end. When the joint between the cylinder and its head becomes leaky, it is necessary to remove the cylinder head and abrade or grind the end of the cylinder so that the head will seat. accurately thereon to overcome this leaky condition. My abrading machine is particularly designed ,for accomplishing this abrading operation in an expeditious and easy manner.

As shown, the present abrading machine includes a supporting frame preferably consisting of a spider having a plurality of radial arms "5 carrying at their outer ends radially adjustable screws 8 arranged to impinge the inner surface of the cylinder 5 at their outer ends so that the machine is effectively mounted upon the cylinder 5 in proper position to operate upon the adjacent end of. the latter in a manner which will presently become apparent. The supporting spider is provided with a central journal studs which is of relatively large diameter and may be hollow as shown, as well as fitted with a bearing sleeve Ill. Journaledupon this hearing sleeve H] of journal stud9 is one end of a radial arm including a tubular inner section ll rigid or integral with a split'ring l2 fitted on thebearing sleeve l with a snug revoluble lit. The radial arm also includes an outer section it slidably telescoped in the tubular inner section new the latter has its outer end portion split longitudinally as at M, ears l being provided at opposite sides of the split or slot I l which are com}. nected by a clamping screw it. By tightening screw Hi, the split end of section ll may be contracted so as to secure the outer armsection is in any radially adjusted position. It will thus be apparent that the screws 8 and the adjustable arm I l, l3 adapt the machine for. use in connec tion with cylinders of different diameters or sizes. place upon the bearing sleeve it of journal stud 9 by means of a cap I! held in place by means of a fastening screw l8 extending axially through the centralportion of the supporting spider, the journal stud 9 and cap ll. The ends of the split band or bearing ring l2 may be connected by screws l9 so as to secure a proper snug revolving fit of said bearing ring or band l2 on the bearing sleeve 10.

The present machine also includes a suitable electric or other motor mounted for vertical adjustment on the outer end of the arm l i, ll, so that its shaft 2| extends vertically and projects downwardly and carries a circular abrading element or disk 22 on its lower end. In practice, the abrading element is adapted to grind the adjacent end of the cylinder 5 where the usual cylinder head seat isprovided thereon.

The motor 20 is mounted for vertical adjustment so that the abrading element can be brought into correct position'for use; To this end, the motor 20 is rigidly carried bya plate 23 having The bearing band or ring I2 is retained in l a dove-tailed lug 24 slidably fitting in a dovetailed groove 25 provided vertically in a plate 26 secured at 21 to the outer end of the outer section I3 of the rotatable radial arm H, I3. Arranged longitudinally of or parallel with groove 25 is an adjusting screw 28 journaled at 29 in the lug 24 and threaded through a part 30 rigid with the plate 24. Thus, by rotating screw 28, the plate 23 and the motor 26 carried thereby may be vertically adjusted so as to bring the abrading element 22 into engagement with the work or to elevate the same out of. engagement with the latter. Rotation of screw 28 may be effected by means of a conventional detachable handle as indicated by .dotted lines at 3| in Figure 2.

In order to counterbalance the arm H, [3 and parts carried thereby, the opposite side of bearing ring or band l2 has a suitable weight 32 attached thereto by means of a bracket 33 secured in place by the bolts l9 which connect the ends of said split bearing band or ring l2. This promotes the ease of turning of the band or ring l2 and parts carried thereby, about the bearing sleeve Hi. In other words, the arrangement minimizes binding between the parts It and I2 and insures extreme freedom of movement of the arm I I, I3, about the axis defined by journal stud 9 so that the motor 20 and theabrading element 22 may traverse the work entirely about its circumference without the expenditure of a great amount of force or labor.

In use, the arm II', [3 and parts carried thereby are manually rotated slowly so that the abrading element will contact with the entire area of the seat of the cylinder;5 to remove all uneven surfaces therefrom. In placing the machine in position, the spider is located within the end of the cylinder as shown in Figures 1 and 2, after which the screws 8 are adjusted outwardly into firm contact with the inner surface of the cylinder so that the supporting spider and parts carried thereby are effectively sustained in place. The motor 20 is then lowered by rotating screw 28 until the abrading element 22 engages the cylinder head seat on the adjacent end of the cylinder 5. While the abrading element is :0- tated by placing the motor 20 in operation, the arm I I, I3 is slowly revolved about the journal stud 9 so as to cause the element 22 to traverse the entire circumference of the cylinder head seat. When the abrading operation has been satisfactorily performed and completed,v the screws 8 may be readily adjusted inwardly so as to permit-the machine to be removed and transported Wherever desired for a repetition of the same operation upon another cylinder.

An important advantage of the present machine is its extreme simplicity of construction and operation, the services of a skilled mechanic being unnecessary. The adjusting and operating devices are all readily accessible; and the machine is rigid, compact, and otherwise well adapted for the intended purpose.

What I claim as new is:

v 1. In a portablegrinding machine, the combination of a supporting member having a central journal stud, means to fasten said supporting member to and within an annular piece of work, an extensible and collapsible telescopic arm journaled at its inner end upon said journal stud, a motor mounted on the outer end of said arm to rotate therewith about said journalstud, a rotatable abrasive element driven by said motor, said telescopic arm comprising a tubular. inner section having a longitudinal slot at its outer end and provided with ears at opposite sides of said slot, and an outer'section slidably telescoped into said inner section, "andva clamping screw connecting saidears for contracting the slotted outer end of said inner arm .section'and main? taining the outer arm section in extended or cs1; lapsed position. 2. In a portable grinding machine, the combi-j nation of a spider having a central upstanding" journal stud and radial arms, relatively long radially adjustable screws carried by the outer ends of said spider arms and arranged't'o have their outer ends impinge the inner surfaceof annular pieces of work of considerably differing diameters to fasten the spider to and within the work, a horizontal extensible and collapsible tel escopic arm journaled at its inner end upon said journal stud for free horizontal rotation about the latter, a motor carried by the outer end of said telescopic arm' to turn therewithabout said journal stud, said motor being vertically adjustable relatively to said arm and having a depend ing drive shaft, and a rotatable abradingeleme'nt secured on the lower end of the drive shaft of said motor.

' ROBERT J. MCQUADE. '1'

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